Improvement in jack-posts for pegging shoes



yMmmm) JUL 41371 UNITED STATES PEEET OFFICE.

DANIEL BOWKER, OF BOSTON7 MASSACHUSETTS.

IMPROVEMENT IN JACK-POSTS FOR PEGGING SHOES.

Specication forming part of Letters Patent No. 116,672, dated July 4, 1871; antedated June 24, 1871.

To all whom 'it may concern:

Be it known that I, DANIEL BOWKER, of Bos ton, in the county of Suffolk and State of Massachusetts, have invented a new adjustable Jack- Post, of which the following is a specification:

My invention relates to the combina-tion with the common jaclcpost now in use of a sliding clamp by which to attach it to the bench, and of a screw and nut by which the post may be adjusted as to its length to suit the workman, and

of a metal bed to which attached.

Figure 1 is a side elevation of my improved adjustable jack-post 5 2, a section; and Fig. 3, a plan of the nform of bed for the jack when a forni of jack which is fastened to the bed on one side is used.

A is a post of wood, like the jac i-post in common use. B is the bed or platform, upon which the jack is secured by serew-bolts. This bed is circularl in Figs. l and 2, and provided with a shelf in Fig. Its form depends upon that of the jack used, and it is provided with an aperture to receive the end which projects from the bottom of the jack, being in this respect like other jack-posts. O is a clamp, free to slide up and down on post A except when secured to it by the thumb-screw a, and capable of being attached to the workmans bench by the jaws b b and screw cl D is the base of the post, connected to it by means of the screw d and nut or socket e. By means of D and its connectionsthe length of the post-that is, the distance of the the jack may be securely bed and jack from the floor-can be regulated to suit the workman, and by means of C the post can be irmly attached to the bench and readily detached. The jack-post now in common use consists of a solid post of wood with a hole bored in its upper end, or of a long foiu or six-sided box made of plank. Its length cannot be adjusted, and it is fastened to the bench by a strip of plank nailed to it and to the bench. It has no metal bed, but the jack is secured to it by screws, which are screwed into the upper face of the post.

It will be seen that my invention consists of two main features, the jfirst and most important being the bed B, whose combination with the post A forms a jack-post, to which the jack can be secured firmly and readily, and Valso be easily removed, thus entirely remedying the main objection to the posts in common use. The second consists in the combination with the jack-post of the clamp O and base D, so that the length of the post can be adjusted to the taste of the user.

I claiin- 1. The bed B, constructed as above described, in combination with a jackpost.

2. The combination of the jackpost A, clamp C, and baseV D, each constructed as above described, and all arranged together as and for the purpose specified.

DANIEL BOVVKER. Wlitnesses J. E. MAYNADIER, GHAs. F. SLEEPER. 

